Improvement in turning-lathes



mit iaia sind @fitte Q PIERRE J. HA.RDY, 0E EW'YORK, N. Y.

Letters Patent No. 113,048, dated March 28, 1871 antedated March 24,1871.

IM PRQVEMENT l-N TURNING-LATHES.

The Schedule referred to in these Lett-exs Patent and making part of thesame.

Y braces, legs, or bars are of necessity or for appearance' employed,and these usually are uished up plain, or else carved at considerableexpense, and a Want has been felt of a lathe suitable to turning inornamentalsections or rings the surface of such curved pieces.

My invention is made to meet this want, and con sists in a hollowmandrel-head, with side straps reaching to the shaft that carries' thepulley and runs 4upon the back center.

The hollow mandrel is' short, like a thimble, and into this isintroduced a movable block, through which passes the curved piece ofwood to be turned, and it is clamped within this block so that theprojecting end of the wood can be turned, and then the curved piece ofwood moved through further and another section turned, 'and so on.

In the drawing I have represented in- Figure 1, alongitudinal section ofthe said lathe;`

and in l Figure 2, a cross-section at the vline :t x.

The frame or head a b is of usual construction, eX- cept that theopening for the hollow mandrel or thimble c is larger than usual, so asto t said mandrel.

The side straps del are formed with or connected to the mandrel c, andextend to the shaft e that runs in the frame b or upon a movable center,as usual.

Around the shaft e is the pulley f, by which the parts are rotated.

The curved strip .of wood g is passed through `a properly-shaped openingin the movable block h, that lits between the slings or straps al andwithin the mandrel c, and clamping-screws or bands are employed tosecure the strip g within the block h, s o that the projecting end maybe turned by a tool held upon any suitable rest, and then the strip beloosened and pushed furtherv through the block h, so that another4section can be turned, and so on until completed.

The rest for the tool must be sufficiently short to be clear of therevolving curved projecting portionl of the strip y, and said ,rest maybe attached upon the frame or head (t. A

The hollow mandrel c, straps al, and shaft c form in substance acompound mandrel, through which the material to be'turned can be passed,in consequence of the lateral openings between the straps d; and theblock h, or clamping device that holds the piece of Wood to be turnedwithin the hollow mandrel, is to be of a shape and character bestadapted to the work to be performed.

I claim as my inventionf The hollow mandrel, with lateral openingsbetween the straps b, and means for Aholding and clamping the curvedpiece to be turned, substantially as and for the purposes set forth.

Signed this 9th day of August, 1870.

PIERRE J. HARDY.

Witnesses:

HAROLD SERRELL, GEO. T. PINCKNEY.

